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Note 7 - Property and Equipment (Tables) | 12 Months Ended
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Dec. 31, 2012
Property, Plant and Equipment [Table Text Block] |
|  | As of December 31, |
|  |  | 2012 |  |  |  | 2011 |
Construction equipment |  | $ | 130,014 |  |  | $ | 125,222 |
Transportation equipment |  |  | 19,266 |  |  |  | 17,963 |
Buildings |  |  | 10,176 |  |  |  | 4,729 |
Office equipment |  |  | 1,279 |  |  |  | 1,077 |
Construction in progress |  |  | -- |  |  |  | 2,544 |
Land |  |  | 4,916 |  |  |  | 3,026 |
Water rights |  |  | 200 |  |  |  | 200 |
|  |  | 165,851 |  |  |  | 154,761 |
Less accumulated depreciation |  |  | (63,543 | ) |  |  | (71,332 | )
|  | $ | 102,308 |  |  | $ | 83,429 |

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- Definition No authoritative reference available. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration